How does resistance relate to conductivity?

1 Answer
Aritra G.
May 30, 2015

Resistance R of a wire is given by :

R = rho*l/A where l is the length of the wire and A, its area of cross section.

rho is a constant for the given material at a particular temperature. It is called to resistivity or specific resistance of the material.

The conductivity (sigma) is defined as,

sigma = 1/rho

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